///
// * jdbm LICENSE v1.00
// *
// * Redistribution and use of this software and associated documentation
// * ("Software"), with or without modification, are permitted provided
// * that the following conditions are met:
// *
// * 1. Redistributions of source code must retain copyright
// *    statements and notices.  Redistributions must also contain a
// *    copy of this document.
// *
// * 2. Redistributions in binary form must reproduce the
// *    above copyright notice, this list of conditions and the
// *    following disclaimer in the documentation and/or other
// *    materials provided with the distribution.
// *
// * 3. The name "jdbm" must not be used to endorse or promote
// *    products derived from this Software without prior written
// *    permission of Cees de Groot.  For written permission,
// *    please contact cg@cdegroot.com.
// *
// * 4. Products derived from this Software may not be called "jdbm"
// *    nor may "jdbm" appear in their names without prior written
// *    permission of Cees de Groot.
// *
// * 5. Due credit should be given to the jdbm Project
// *    (http://jdbm.sourceforge.net/).
// *
// * THIS SOFTWARE IS PROVIDED BY THE ndbm PROJECT AND CONTRIBUTORS
// * ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT
// * NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
// * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL
// * CEES DE GROOT OR ANY CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
// * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
// * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
// * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
// * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
// * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
// * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
// * OF THE POSSIBILITY OF SUCH DAMAGE.
// *
// * Copyright 2001 (C) Alex Boisvert. All Rights Reserved.
// * Contributions are Copyright (C) 2001 by their associated contributors.
// *
// 

//*************************************************************************
//**  Included in JDMB 1.0 port to SharpDBM;  11/2013 Cyrus Neah cneah@codingreal.com
//**  SharpDBM is an independent reimplementation of the JDBM 1.0 software library in C#  
//*************************************************************************

using System;

namespace SharpDBM.helper
{


///
// * Comparator for Integer objects.
// *
// * @author <a href="mailto:cdaller@iicm.edu">Christof Dallermassl</a>
// * @version $Id: IntegerComparator.java,v 1.2 2002/05/31 06:33:20 boisvert Exp $
// 
	[System.Serializable]
	public  class IntegerComparator : Comparator
	{

//    *
//     * Version id for serialization.
//     
		internal const long serialVersionUID = 1L;


//    *
//     * Compare two objects.
//     *
//     * @param obj1 First object
//     * @param obj2 Second object
//     * @return a positive integer if obj1 > obj2, 0 if obj1 == obj2,
//     *         and a negative integer if obj1 < obj2
//     
		public virtual int compare(object obj1, object obj2)
		{
			if (obj1 == obj2)
			{
				return 0;
			}

			if (obj1 == null)
			{
				throw new ArgumentOutOfRangeException("Argument 'obj1' is null");
			}

			if (obj2 == null)
			{
				throw new ArgumentOutOfRangeException("Argument 'obj2' is null");
			}

		// complicated to avoid usage of Integer.compareTo, as this
		// method is Java 1.2 only!
			int int1 = ((int) obj1);
			int int2 = ((int) obj2);
			if (int1 == int2)
			{
				return 0;
			}

			if (int1 < int2)
			{
			  return -1;
			}
			else
			{
			  return 1;
			}
		}

	}

}